Spiral Wound ANSI Class 150 Gasket, B16.47 ,Series B (in)

Dimensions to ASME B16.20 - Metallic Gaskets for Pipe Flanges: Ring-Joint, Spiral-Wound, and Jacketed
Inner rings are recommended for all graphite filled gaskets, required for all PTFE filled gaskets.
The gasket outside diameter tolerance for NPS 26" through NPS 60" is ±0.06".
The gasket inside diameter tolerance for NPS 26" through NPS 34" is ±0.03"; for NPS 36" through NPS 60" is ±0.05".
The centering ring outside diameter tolerance is ±0.03"

Pipe Size (NPS)	Inner Ring Inside Diameter A	Sealing Element Inside Diameter B	Sealing Element Outside Diameter C	Outer Ring Outside Diameter D
26	25.75	26.50	27.50	28.56
28	27.75	28.50	29.50	30.56
30	29.75	30.50	31.50	32.56
32	31.75	32.50	33.50	34.69
34	33.75	34.50	35.75	36.81
36	35.75	36.50	37.75	38.88
38	37.75	38.37	39.75	41.13
40	39.75	40.25	41.88	43.13
42	41.75	42.50	43.88	45.13
44	43.75	44.25	45.88	47.13
46	45.75	46.50	48.19	49.44
48	47.75	48.50	50.00	51.44
50	49.75	50.50	52.19	53.44
52	51.75	52.50	54.19	55.44
54	53.75	54.50	56.00	57.63
56	56.00	56.88	58.18	59.63
58	58.19	59.07	60.19	62.19
60	60.44	61.31	62.44	64.19